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Message-ID: <CAKaWdxbcpZKL9pkf0sKS3OarSE-jRgy8QKuGu=0NEd3Rigq0dg@mail.gmail.com> Date: Tue, 13 Sep 2011 19:11:50 +1200 From: Keith Chew <keith.chew@...il.com> To: linux-kernel <linux-kernel@...r.kernel.org> Subject: IRQ Storm - nobody cared Hi I have been trying trace through an IRQ problem, but without any success. Summary of problem: - Hardware with Intel ICH7 chipset, and PCI video capture card = Working flawlessly, getting 100+ interrupts per second from /proc/interrupts (units have been in production for 6+ years) - New hardware with Intel ICH9 chipset = getting spurious interrupts (20000+ per second), and these from dmesg at bootup: -------------------------------------- Sep 13 18:49:01 localhost kernel: bttv1: timeout: drop=0 irq=1/1974, risc=36b4301c, bits: VSYNC HSYNC RISCI Sep 13 18:49:01 localhost kernel: bttv1: timeout: drop=0 irq=1/1974, risc=36b4301c, bits: VSYNC HSYNC RISCI Sep 13 18:49:02 localhost kernel: bttv3: timeout: drop=0 irq=3/1806, risc=36818744, bits: VSYNC HSYNC RISCI Sep 13 18:49:03 localhost kernel: bttv3: timeout: drop=0 irq=3/1806, risc=36b3b03c, bits: VSYNC HSYNC RISCI Sep 13 18:49:03 localhost kernel: irq 17: nobody cared (try booting with the "irqpoll" option) Sep 13 18:49:03 localhost kernel: Pid: 0, comm: swapper Not tainted 2.6.39.4 #10 Sep 13 18:49:03 localhost kernel: Call Trace: Sep 13 18:49:03 localhost kernel: [<c0471785>] ? __report_bad_irq+0x25/0x90 Sep 13 18:49:03 localhost kernel: [<c0471969>] ? note_interrupt+0x179/0x1b0 Sep 13 18:49:03 localhost kernel: [<c04702a3>] ? handle_irq_event_percpu+0x93/0x1e0 Sep 13 18:49:03 localhost kernel: [<c0471ed0>] ? handle_percpu_irq+0x50/0x50 Sep 13 18:49:03 localhost kernel: [<c0470409>] ? handle_irq_event+0x19/0x30 Sep 13 18:49:03 localhost kernel: [<c0471f05>] ? handle_fasteoi_irq+0x35/0x80 Sep 13 18:49:03 localhost kernel: <IRQ> [<c040371a>] ? do_IRQ+0x3a/0xb0 Sep 13 18:49:03 localhost kernel: [<c075f0b0>] ? common_interrupt+0x30/0x40 Sep 13 18:49:03 localhost kernel: [<c040887d>] ? mwait_idle+0x5d/0x140 Sep 13 18:49:03 localhost kernel: [<c0401b7c>] ? cpu_idle+0x6c/0x90 Sep 13 18:49:03 localhost kernel: [<c093f7d6>] ? start_kernel+0x32b/0x330 Sep 13 18:49:03 localhost kernel: [<c093f2eb>] ? kernel_init+0x11c/0x11c Sep 13 18:49:03 localhost kernel: [<c093f0b5>] ? i386_start_kernel+0xb5/0xc0 Sep 13 18:49:03 localhost kernel: handlers: Sep 13 18:49:03 localhost kernel: [<fb16b830>] (bttv_irq+0x0/0x9d0 [bttv]) Sep 13 18:49:03 localhost kernel: [<fb16b830>] (bttv_irq+0x0/0x9d0 [bttv]) Sep 13 18:49:03 localhost kernel: Disabling IRQ #17 Sep 13 18:49:04 localhost kernel: irq 18: nobody cared (try booting with the "irqpoll" option) Sep 13 18:49:04 localhost kernel: Pid: 0, comm: swapper Not tainted 2.6.39.4 #10 Sep 13 18:49:04 localhost kernel: Call Trace: Sep 13 18:49:04 localhost kernel: [<c0471785>] ? __report_bad_irq+0x25/0x90 Sep 13 18:49:04 localhost kernel: [<f99892c0>] ? piix_irq_check+0x10/0x20 [ata_piix] Sep 13 18:49:04 localhost kernel: [<c0471969>] ? note_interrupt+0x179/0x1b0 Sep 13 18:49:04 localhost kernel: [<c04702a3>] ? handle_irq_event_percpu+0x93/0x1e0 Sep 13 18:49:04 localhost kernel: [<c0419917>] ? __io_apic_modify_irq+0x77/0x90 Sep 13 18:49:04 localhost kernel: [<c0471ed0>] ? handle_percpu_irq+0x50/0x50 Sep 13 18:49:04 localhost kernel: [<c0471ed0>] ? handle_percpu_irq+0x50/0x50 Sep 13 18:49:04 localhost kernel: [<c0470409>] ? handle_irq_event+0x19/0x30 Sep 13 18:49:04 localhost kernel: [<c0471f05>] ? handle_fasteoi_irq+0x35/0x80 Sep 13 18:49:04 localhost kernel: <IRQ> [<c040371a>] ? do_IRQ+0x3a/0xb0 Sep 13 18:49:04 localhost kernel: [<c075f0b0>] ? common_interrupt+0x30/0x40 Sep 13 18:49:04 localhost kernel: [<c040887d>] ? mwait_idle+0x5d/0x140 Sep 13 18:49:04 localhost kernel: [<c0401b7c>] ? cpu_idle+0x6c/0x90 Sep 13 18:49:04 localhost kernel: [<c093f7d6>] ? start_kernel+0x32b/0x330 Sep 13 18:49:04 localhost kernel: [<c093f2eb>] ? kernel_init+0x11c/0x11c Sep 13 18:49:04 localhost kernel: [<c093f0b5>] ? i386_start_kernel+0xb5/0xc0 Sep 13 18:49:04 localhost kernel: handlers: Sep 13 18:49:04 localhost kernel: [<c0661f60>] (usb_hcd_irq+0x0/0x50) Sep 13 18:49:04 localhost kernel: [<fb16b830>] (bttv_irq+0x0/0x9d0 [bttv]) Sep 13 18:49:04 localhost kernel: [<fb16b830>] (bttv_irq+0x0/0x9d0 [bttv]) Sep 13 18:49:04 localhost kernel: Disabling IRQ #18 Sep 13 18:49:36 localhost kernel: irq 19: nobody cared (try booting with the "irqpoll" option) Sep 13 18:49:36 localhost kernel: Pid: 1502, comm: mplayer Not tainted 2.6.39.4 #10 Sep 13 18:49:36 localhost kernel: Call Trace: Sep 13 18:49:36 localhost kernel: [<c0471785>] ? __report_bad_irq+0x25/0x90 Sep 13 18:49:36 localhost kernel: [<f99892c0>] ? piix_irq_check+0x10/0x20 [ata_piix] Sep 13 18:49:36 localhost kernel: [<c0471969>] ? note_interrupt+0x179/0x1b0 Sep 13 18:49:36 localhost kernel: [<c04702a3>] ? handle_irq_event_percpu+0x93/0x1e0 Sep 13 18:49:36 localhost kernel: [<c0419917>] ? __io_apic_modify_irq+0x77/0x90 Sep 13 18:49:36 localhost kernel: [<c0471ed0>] ? handle_percpu_irq+0x50/0x50 Sep 13 18:49:36 localhost kernel: [<c0471ed0>] ? handle_percpu_irq+0x50/0x50 Sep 13 18:49:36 localhost kernel: [<c0470409>] ? handle_irq_event+0x19/0x30 Sep 13 18:49:36 localhost kernel: [<c0471f05>] ? handle_fasteoi_irq+0x35/0x80 Sep 13 18:49:36 localhost kernel: <IRQ> [<c040371a>] ? do_IRQ+0x3a/0xb0 Sep 13 18:49:36 localhost kernel: [<c075f0b0>] ? common_interrupt+0x30/0x40 Sep 13 18:49:36 localhost kernel: [<c075007b>] ? pci_scan_bridge+0xdc/0x4dc Sep 13 18:49:36 localhost kernel: [<c0750000>] ? pci_scan_bridge+0x61/0x4dc Sep 13 18:49:36 localhost kernel: handlers: Sep 13 18:49:36 localhost kernel: [<c0646f20>] (ata_bmdma_interrupt+0x0/0x1e0) Sep 13 18:49:36 localhost kernel: [<c0646f20>] (ata_bmdma_interrupt+0x0/0x1e0) Sep 13 18:49:36 localhost kernel: [<fb16b830>] (bttv_irq+0x0/0x9d0 [bttv]) Sep 13 18:49:36 localhost kernel: [<fb16b830>] (bttv_irq+0x0/0x9d0 [bttv]) Sep 13 18:49:36 localhost kernel: Disabling IRQ #19 -------------------------------------- Have tested on 3 pieces of new hardware, and all same results (so it is not faulty RAM, CPU, HDD or PCI card). I have updated the BIOS to the latest, and also tried all possible combinations: nosmp, noapic, nolapic, noriqdebug, irqpoll, etc. From the kernel compilation options, I have tried all the things that are related to IRQs and PCI, eg disable MSI, PCIe, ASPM, etc. I end up with the same results. Also upgraded to the lastest kernel 2.6.39.4, and getting the same results. This is driving me insane. I have analysed the dmesg, and I cannot pin point the culprit. But if I pull out the PCI video capture card, then the system behaves well. So, perhaps this is a BUG in the bttv driver with ICH9 chipset? Regards Keith -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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